<template>
  <div id="app">
  <h1>----------------------------</h1>
  <el-tree
    :data="data"
    show-checkbox
    default-expand-all
    node-key="id"
    ref="tree"
    highlight-current
    :props="defaultProps">
</el-tree>
<el-button @click="setCheckedKeys">通过 key 设置</el-button>
<el-button @click="getCheckedKeys">通过 key 获取</el-button>
  </div>
</template>

<script>
export default {
  data () {
    return {
      data: [{
        id: 1,
        label: '一级 1',
        children: [{
          id: 4,
          label: '二级 1-1',
          children: [{
            id: 9,
            label: '三级 1-1-1'
          }, {
            id: 10,
            label: '三级 1-1-2'
          }]
        }]
      }, {
        id: 2,
        label: '一级 2',
        children: [{
          id: 5,
          label: '二级 2-1'
        }, {
          id: 6,
          label: '二级 2-2'
        }]
      }, {
        id: 3,
        label: '一级 3',
        children: [{
          id: 7,
          label: '二级 3-1'
        }, {
          id: 8,
          label: '二级 3-2'
        }]
      }],
      defaultProps: {
        children: 'children',
        label: 'label'
      },
      checkAll: false,
      checkedCities: ['上海', '北京'],
      cities: ['上海', '北京', '广州', '深圳'],
      visible: false,
      form: {
        FeeItemName: '',
        CatId: ''
      }
    }
  },
  methods: {
    getCheckedKeys () {
      console.log('getCheckedKeys', this.$refs.tree.getCheckedKeys())
      console.log('getHalfCheckedKeys', this.$refs.tree.getHalfCheckedKeys())
    },
    setCheckedKeys () {
      this.$refs.tree.setChecked(3, true, false)
      this.$refs.tree.setChecked(7, true, false)
    }

  }
}
</script>

<style lang="scss" scoped>
.row{
  margin: 25px 5px;
  .l-button {
    margin-left:5px;
  }
}
</style>
